EP1540316A1 - Chemochromer sensor und verfahren zum nachweis eines reagenz und testsubstanz - Google Patents

Chemochromer sensor und verfahren zum nachweis eines reagenz und testsubstanz

Info

Publication number
EP1540316A1
EP1540316A1 EP03748540A EP03748540A EP1540316A1 EP 1540316 A1 EP1540316 A1 EP 1540316A1 EP 03748540 A EP03748540 A EP 03748540A EP 03748540 A EP03748540 A EP 03748540A EP 1540316 A1 EP1540316 A1 EP 1540316A1
Authority
EP
European Patent Office
Prior art keywords
light
chemochromic
pins
test
emitting diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03748540A
Other languages
English (en)
French (fr)
Inventor
William S. Yerazunis
Dermot Diamond
Paul H. Dietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dublin City University
Mitsubishi Electric Corp
Original Assignee
Dublin City University
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dublin City University, Mitsubishi Electric Corp filed Critical Dublin City University
Publication of EP1540316A1 publication Critical patent/EP1540316A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour

Definitions

  • This invention relates generally to chemochromic sensors, and more particularly to LED-based chemochromic sensors.
  • a test material is allowed to react with a chemochromic reagent in a test area.
  • a catalyst can be used to facilitate a reversible reaction. The reaction changes the optical property of the reagent, which can be measured with a light sensor.
  • chemochromic sensors typically use one-way light measurements of the test area. Light is generated by a light-emitting diode (LED) and sensed by a phototransistor, see, e.g., Benson et al., "Low-cost fiber-optic chemochromic hydrogen gas detector," Proceedings 1999 U.S. DOE Hydrogen Program review,
  • the present invention provides a multi-way LED-based chemochromic sensor.
  • the sensor uses multiple bi-directional LEDs, each LED is optically aligned with one or more test areas.
  • Each LED is used as both a light emitter when driven in forward bias, and as a light detector when driven in reverse bias. By alternating the bias on the LEDs, multi-way light measurements of the test area can be obtained.
  • Figure 1 is a block diagram of a multi-way LED-based chemochromic sensor according to the invention.
  • Figure 2 is a side view of a two LED chemochromic sensor according to the invention.
  • Figures 3 is a side view of a three LED chemochromic sensor according to the invention.
  • Figure 1 shows a multi-way LED-based chemochromic sensor 100 according to the invention.
  • a first bi-directional LED 110 and a second bidirectional LED 120 are connected respectively in series to pairs of I/O pins of a microprocessor 130 via resistors 115 and 125.
  • the bias on the LEDs determines whether the LEDs emit or sense light.
  • a junction capacitance of a reverse- biased LED is first charged.
  • the junction is then exposed to light, which causes the junction voltage to drop from a logic-high level to a logic-low level.
  • the amount of time that it takes to effect this drop is a measure of the amount of incident light, and in this application the amount of test material.
  • the amount of background light to subtract can be measured by toning the emitting LED off.
  • a test area 101 is exposed to a mixture 102 of a chemochromic reagent and a test material, generally in combination or alone "chemochromic materials.”
  • the mixture in liquid or gas form, can be applied to the test area in any number of known manners.
  • the mixture 102 is illuminated 111 by the first LED 110 when it is driven in forward bias.
  • Reflected light 121 is sensed by the second LED 120 when it is driven in reverse bias.
  • the amount of sensed light is measured by the microprocessor 130 executing operating and application programs.
  • the microprocessor also determines the bias on the LEDs. By reversing the bias, light can be emitted by the LED 120, and sensed by the LED 110 to provide a multi-way
  • LED-based chemochromic sensor By measuring the amount of light in both directions, and comparing the two measurements nulling and differential measurements can be obtained.
  • Figure 2 shows an arrangement 200 of a two-LED chemochromic sensor.
  • the two LEDs 110 and 120 are at right angles to each other.
  • the LEDs are connected by a transparent, elbow-shaped light-guide 210.
  • the mixture is applied to the test area 101 at the corner of the light- guide 210 where light 211, in either direction, is reflected.
  • Figure 3 shows a chemochromic sensor 300 with multiple LEDs 310 and multiple light-guides 315-317.
  • some of the light-guides are used for measuring known amounts of test material, while other-light guides are used for measuring unknown amounts of test material.
  • Multiple light-guides provide higher accuracy, repeatability, and shorter testing times.
  • light-guide 315 is used to measure only a chemochromic reagent 311 for aging characteristics
  • light-guide 316 is used to measure a known amount of test material 321
  • light-guide 317 is used to measure an unknown amount of test material 331. It should be noted that additional sensors and light-guides can be used.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP03748540A 2002-09-20 2003-09-18 Chemochromer sensor und verfahren zum nachweis eines reagenz und testsubstanz Withdrawn EP1540316A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/251,251 US7008795B2 (en) 2002-09-20 2002-09-20 Multi-way LED-based chemochromic sensor
US251251 2002-09-20
PCT/JP2003/011931 WO2004027403A1 (en) 2002-09-20 2003-09-18 Chemochromic sensor and method for sensing a chemochromic reagent and test material

Publications (1)

Publication Number Publication Date
EP1540316A1 true EP1540316A1 (de) 2005-06-15

Family

ID=31992696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03748540A Withdrawn EP1540316A1 (de) 2002-09-20 2003-09-18 Chemochromer sensor und verfahren zum nachweis eines reagenz und testsubstanz

Country Status (6)

Country Link
US (1) US7008795B2 (de)
EP (1) EP1540316A1 (de)
JP (1) JP2006500560A (de)
CN (1) CN100465623C (de)
AU (1) AU2003267817A1 (de)
WO (1) WO2004027403A1 (de)

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WO2006072071A2 (en) * 2004-12-30 2006-07-06 Phoseon Technology Inc. Methods and systems relating to light sources for use in industrial processes
EP2009676B8 (de) 2002-05-08 2012-11-21 Phoseon Technology, Inc. Halbleitermaterial-Prüfsystem
US7819550B2 (en) * 2003-10-31 2010-10-26 Phoseon Technology, Inc. Collection optics for led array with offset hemispherical or faceted surfaces
US7524085B2 (en) * 2003-10-31 2009-04-28 Phoseon Technology, Inc. Series wiring of highly reliable light sources
JP2005164575A (ja) * 2003-11-13 2005-06-23 Riken Keiki Co Ltd ガス検知材、及びこれに適したガス検出装置
JP2005265849A (ja) * 2004-03-17 2005-09-29 Mitsubishi Electric Research Laboratories Inc 光センサ及び入射光を検知する方法
TWI312583B (en) 2004-03-18 2009-07-21 Phoseon Technology Inc Micro-reflectors on a substrate for high-density led array
TWI302756B (en) 2004-04-19 2008-11-01 Phoseon Technology Inc Imaging semiconductor structures using solid state illumination
JP2007121988A (ja) * 2005-09-30 2007-05-17 Seiko Epson Corp 表示方法、表示装置及び電子機器
US8133741B2 (en) 2005-10-26 2012-03-13 General Electric Company Methods and systems for delivery of fluidic samples to sensor arrays
US7723120B2 (en) * 2005-10-26 2010-05-25 General Electric Company Optical sensor array system and method for parallel processing of chemical and biochemical information
US7642527B2 (en) * 2005-12-30 2010-01-05 Phoseon Technology, Inc. Multi-attribute light effects for use in curing and other applications involving photoreactions and processing
WO2008016590A2 (en) 2006-07-31 2008-02-07 Visualant, Inc. System and method of evaluating an object using electromagnetic energy
US8081304B2 (en) 2006-07-31 2011-12-20 Visualant, Inc. Method, apparatus, and article to facilitate evaluation of objects using electromagnetic energy
US7996173B2 (en) 2006-07-31 2011-08-09 Visualant, Inc. Method, apparatus, and article to facilitate distributed evaluation of objects using electromagnetic energy
US7829162B2 (en) * 2006-08-29 2010-11-09 international imagining materials, inc Thermal transfer ribbon
US7883898B2 (en) * 2007-05-07 2011-02-08 General Electric Company Method and apparatus for measuring pH of low alkalinity solutions
US8928227B2 (en) 2009-08-23 2015-01-06 Thomas John Padula Light emitting bio-mimicry device
WO2013119824A1 (en) 2012-02-10 2013-08-15 Visualant, Inc. Systems, methods and articles related to machine-readable indicia and symbols
US9316581B2 (en) 2013-02-04 2016-04-19 Visualant, Inc. Method, apparatus, and article to facilitate evaluation of substances using electromagnetic energy
US9041920B2 (en) 2013-02-21 2015-05-26 Visualant, Inc. Device for evaluation of fluids using electromagnetic energy
WO2014165003A1 (en) 2013-03-12 2014-10-09 Visualant, Inc. Systems and methods for fluid analysis using electromagnetic energy
BR112018012812A2 (pt) 2015-12-22 2018-12-04 3M Innovative Properties Co sistema desinfetante com monitoramento de desempenho
CN107688249B (zh) * 2016-08-05 2021-09-10 豪威科技股份有限公司 液晶面板测试平台
DE102017125489A1 (de) * 2017-06-30 2019-01-03 Avago Technologies General Ip (Singapore) Pte. Ltd. Analyt-Messvorrichtung
CN112313500B (zh) * 2018-06-25 2024-07-16 力特保险丝公司 具有动态光学配置控制的光学雨水传感器
JP7320970B2 (ja) * 2019-03-28 2023-08-04 株式会社ジャパンディスプレイ 表示装置

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Also Published As

Publication number Publication date
JP2006500560A (ja) 2006-01-05
AU2003267817A1 (en) 2004-04-08
CN1592850A (zh) 2005-03-09
CN100465623C (zh) 2009-03-04
WO2004027403A1 (en) 2004-04-01
US20040057873A1 (en) 2004-03-25
US7008795B2 (en) 2006-03-07
AU2003267817A8 (en) 2004-04-08

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